16results about "Generator circuit arrangements control" patented technology

Provided in the present application are a motor zero position angle calibration method, a vehicle and a storage medium. The method is applied to the field of vehicles, and the method comprises: if an obtained control signal sent by a vehicle control unit is a calibration mode setting signal, reading a reserved bit value of the calibration mode setting signal; if the reserved bit value is a preset calibration value, performing zero position angle calibration processing on a vehicle motor on the basis of the calibration mode setting signal, so as to obtain a calibrated zero position angle; and updating the motor zero position angle on the basis of the calibrated zero position angle, and using the updated motor zero position angle to control the vehicle motor to operate. The method can again determine whether the reserved bit value meets the preset calibration value after reception of the calibration mode setting signal, and uses an idle reserved bit as an identification bit, such that the vehicle motor is prevented from mistakenly entering the calibration mode under signal interference, thereby improving the accuracy of zero position angle calibration, and further ensuring the normal operation of the vehicle motor.

The present invention provides a method for estimating the subtransient reactance of a surface-mounted permanent magnet motor based on the finite element method, which relates to the technical field of motors. The method includes constructing a finite element model, setting the rotor angular frequency, and calculating the back electromotive force amplitude and synchronous reactance under specific working conditions; performing at least two groups of parameter settings on the model, short-circuiting the three-phase winding circuit, and calculating the three-phase short-circuit current waveform; for the three-phase short-circuit current waveforms under different groups of parameters, selecting a specific phase to calculate the waveform difference; performing a spectral analysis on the waveform difference, and calculating the subtransient reactance parameter under the initial rotor position condition according to the relevant parameters of specific spectral components, the back electromotive force amplitude, and the synchronous reactance; changing the initial rotor position, and taking the average value of the subtransient reactance parameters at multiple positions as the final result. The present invention considers the influence of rotor eddy currents, and based on the finite element method, accurately and efficiently estimates the subtransient reactance through multi-step calculations and parameter adjustments, helping to optimize the power system.

Disclosed are a system and method for protecting a generator set from magnetic pole slip. The system may include a generator, a prime mover, and a controller. The generator includes a stator and a rotor. The prime mover is configured to drive the rotor to rotate. The controller may be configured to: determine a mechanical state of the generator based on data related to translational displacement of the rotor; determine an electrical state of the generator based on (a) a load angle or (b) a load angle and a rate of change of the load angle associated with rotation of the rotor in the stator; determine an operating state of the generator based on a fusion of the mechanical state and the electrical state; if the operating state is a magnetic pole slip warning, activate an output member to display or issue a warning; and if the operating state is a magnetic pole slip, activate a protective action.

A device for determining the angular position of a rotor of a rotary electric machine on the basis of signals delivered by a plurality of position sensors. The device includes a circuit that applies a control loop to estimate the position of the rotor, and that delivers as output a signal representative of the position of the rotor. Also included is at least one circuit for performing dynamic processing of an odd-order harmonic of a signal resulting from the signals delivered by the position sensors.

The invention discloses a synchronous generator rotor position sensor fault detection method, device and equipment, and the method comprises the steps: estimating the counter electromotive force of a generator through a second-order generalized integral sliding-mode observer, extracting the estimation values of the rotor position and the rotating speed from the counter electromotive force, and enabling the estimation values to serve as the standby output of a position sensor, when the sensor is abnormal, the abnormality can be found in time by judging the magnitude of the residual error, a standby signal is switched, and safe and stable operation is realized in a position-sensor-free state, so that the safety and reliability of the system are effectively improved; the second-order generalized integral sliding mode observer is a back electromotive force observer, a transfer function of the observer shows band-pass filtering characteristics, indifference estimation of the rotor position can be achieved, meanwhile, the system does not need to be additionally provided with a low-pass filter, and the control structure is simplified.

An aircraft turbine engine including at least a propulsion shaft and an electric motor. A rotor is rigidly connected to the propulsion shaft. The electric motor includes at least three power channels, a control device designed to determine a control parameter for each power channel on the basis of a control command, and a correction device designed to correct a precession movement of the rotor relative to the stator. The correction device being designed to determine the control command of the control device from a setpoint command and a precession level. The control command being designed to generate a global magnetic force opposing the precession movement of the rotor so as to damp said movement.

There is described an assembly for determining the electrical angle of a rotor in an electrical machine, such as a wind turbine generator. The assembly comprises: (a) an encoder having an encoder wheel configured to contact a surface of the rotor to obtain relative rotor rotation information based on rotation of the encoder wheel, (b) an electrical angle observer configured to provide an absolute electrical angle, and (c) a processing device coupled to communicate with the encoder and the electrical angle observer and configured to determine the electrical angle of the rotor based on the relative rotor rotation information and the absolute electrical angle. Furthermore, a wind turbine generator comprising such an assembly, and a method of determining the electrical angle of a rotor in an electrical machine, such as a wind turbine generator, are described.

It is described a method of operating an, in particular multiple winding set, electrical synchronous machine (2), in particular during synchronization of a position observer, comprising a rotor (3) and a stator (4) having a first winding set (5) and in particular at least one second winding set (6), the method comprising: using a first position observer (12_1) configured to observe the first winding set (5) in order to observe a first value (13_1) of the rotor position, in particular based on an external initial value of the rotor position; synchronizing the machine (2) based on the first observed value (13 1) or an external initial value of the rotor position.

There is described an electric power generating apparatus having: a free-piston linear expander having a moving shaft creating mechanical power; an electrical generator converting the mechanical power into electrical power; a variable frequency drive configured for applying an electromagnetic load force modifying the shaft's movement; and a controller communicatively coupled to the variable frequency drive, the controller configured to perform the steps of: receiving sensor data including a first shaft position value, a first shaft velocity value, and a first electromagnetic load force value; using a drive control module, determining, based on the sensor, a second electromagnetic load force value which when applied would cause a shaft velocity to gradually change to a second shaft velocity value, the second electromagnetic load force value and the second shaft velocity value causing an output power value to correspond to a desired output power value; and applying the second electromagnetic load force value.

A power generation device is described that includes a free-piston linear expander having a moving shaft that produces mechanical power, a generator that converts the mechanical power to electrical power, a variable frequency drive configured to apply an electromagnetic loading force that modifies shaft motion, and a controller communicatively coupled to the variable frequency drive, the controller configured to: receive sensor data including a first shaft position value, a first shaft speed value, and a first electromagnetic loading force value; determine, using a drive control module, based on the sensors, a second electromagnetic loading force value that, when applied, gradually changes the shaft speed to a second shaft speed value, wherein the second electromagnetic loading force value and the second shaft speed value cause an output power value to correspond to a desired output power value; and apply the second electromagnetic loading force value.

The present invention discloses a synchronous motor electric field excitation coupler, system and rotor position identification method. The synchronous motor electric field excitation coupler includes a transmitting electrode plate and a receiving electrode plate; the height of the concentric circular deep grooves in the fan-shaped area of the transmitting electrode plate is lower than the height of the concentric circular deep grooves in other areas of the transmitting electrode plate; the height of the concentric circular deep grooves on the receiving electrode plate is distributed in a staggered pattern of high-low-high-low regularly with the fan-shaped area as a period, and p is the number of pole pairs of the synchronous motor. By establishing the mapping relationship between the coupling capacitance between the transmitting electrode plate and the receiving electrode plate and the rotor electrical angle, the rotor electrical angle is determined according to the identified coupling capacitance. Based on the improvement of the structure of the synchronous motor electric field excitation coupler, the present invention eliminates the expensive and high-failure- rate rotor position sensor without increasing additional hardware costs, has the advantages of economy and reliability, and can accurately identify the rotor position within the full speed range.

The invention discloses a rotor position estimation method during a rotary transformer fault of a variable-pitch motor, and the method comprises the steps: carrying out the estimation of a sliding-mode observer control model based on the measurement values of motor current and motor voltage, and obtaining a motor back electromotive force high-frequency pulse signal; performing filtering processing on the back electromotive force high-frequency pulse signal to obtain a back electromotive force observation signal in a continuous wave shape, performing calculation based on the back electromotive force observation signal to obtain a rotor flux linkage observation angle, and performing lag angle theta compensation correction on the rotor flux linkage observation angle, taking the rotor flux linkage angle obtained after compensation and correction as an estimation result of the rotor position; the whole calculation process is simple and efficient, and the stability is good; during application, when the decoding signal of the rotary transformer is detected to be abnormal, the estimation result of the rotor position is extracted to replace the abnormal decoding signal of the rotary transformer, so that the paddle feathering work of the variable-paddle driver is ensured to be continuously and normally executed, the paddle returns to the safe position, and the economic loss is avoided.

The invention relates to an aircraft turbine engine including at least a propulsion shaft and an electric motor (1), the rotor (3) of which is rigidly connected to the propulsion shaft, the electric motor (1) comprising at least three power channels (C1-C4), a control device (4) designed to determine a control parameter for each power channel (C1-C4) on the basis of a control command (Com), and a correction device (5) designed to correct a precession movement of the rotor (3) relative to the stator (2), the correction device (5) being designed to determine the control command (Com) of the control device (4) from a setpoint command (Com_cons) and a precession level (NP), the control command (Com) being designed to generate a global magnetic force (FG) opposing the precession movement (P+) of the rotor (3) so as to damp said movement.

There is described an electric power generating apparatus having: a free-piston linear expander having a moving shaft creating mechanical power; an electrical generator converting the mechanical power into electrical power; a variable frequency drive configured for applying an electromagnetic load force modifying the shaft's movement; and a controller communicatively coupled to the variable frequency drive, the controller configured to perform the steps of: receiving sensor data including a first shaft position value, a first shaft velocity value, and a first electromagnetic load force value; using a drive control module, determining, based on the sensor, a second electromagnetic load force value which when applied would cause a shaft velocity to gradually change to a second shaft velocity value, the second electromagnetic load force value and the second shaft velocity value causing an output power value to correspond to a desired output power value; and applying the second electromagnetic load force value.

The invention relates to the technical field of automatic testing of aircraft starting generators, and discloses an angle adjusting method for a resolver in a starting generator, which comprises the following steps: controlling the starting generator to operate based on a preset rotating speed, and collecting multiple angle measurement values output by the resolver in the starting generator, calculating a plurality of angle deviation values corresponding to the plurality of angle measurement values based on a preset angle value; when the angle deviation values are inconsistent, resistance detection is carried out on the resolver stators, and the resolver stators with abnormal detection results are replaced; and when the angle deviation values are consistent, acquiring an electrical angle value of the starting generator, converting the electrical angle value into a mechanical adjustment angle of the resolver according to a preset angle conversion formula, and performing angle adjustment on a stator of the resolver according to the mechanical adjustment angle. According to the method, the precision and reliability of angle measurement are improved, the whole adjusting process is more standardized and controllable, time and manpower resources are saved, and the utilization rate of the whole equipment is improved.

A parameter identification method and a parameter identification apparatus for a wind turbine generator are provided, in which the parameter identification method includes: controlling the generator to no-load start and shut down by adjusting a blade angle; acquiring operating data of the generator in a duration from no-load start to shutdown of the generator; and determining parameters of the generator based on the acquired operating data of the generator.